Oracle Xml Schema Registration problem.

Hi Gurus,
I tried to register a schema using an xsd named 'EntityBase.xsd', using the following block. It got registered successfully.
BEGIN
DBMS_XMLSCHEMA.registerSchema(
SCHEMAURL => 'http://xmlns.oracle.com/xdb/EntityBase.xsd',
SCHEMADOC => bfilename('XMLDIR','EntityBase.xsd'),
LOCAL => FALSE,
CSID => nls_charset_id('AL32UTF8'));
END;
select local,schema_url,int_objname,qual_schema_url from dba_xml_schemas where schema_url like
'%http://xmlns.oracle.com/xdb/EntityBase.xsd%';
This gives me a record.
Now I have another xsd, VersionedEntity.xsd with which I would like to register another schema. In the xsd definition for VersionedEntity.xsd, it has Entity.xsd being used and which is already registered and the .xsd exists in the same directory 'XMLDIR'. But when I register using the following block,
BEGIN
DBMS_XMLSCHEMA.registerSchema(
SCHEMAURL => 'http://xmlns.oracle.com/xdb/VersionedEntity.xsd',
SCHEMADOC => bfilename('XMLDIR','VersionedEntity.xsd'),
CSID => nls_charset_id('AL32UTF8'));
END;
I get
ORA-31000: Resource 'EntityBase.xsd' is not an XDB schema document
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 37
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 61
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 126
ORA-06512: at line 2
Please help me with your expert advice. Am I doing something wrong?
Thanks and Regards,

There is a forum dedicated to XML...
XML DB

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by sudeepk:
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"74E044080020C94102' AS OBJECT ("SYS_XDBPD$" "XDB"."XDB$RAW_LIST_T",""
"ATTRIBUTE_01" NUMBER(38),"ATTRIBUTE_02" VARCHAR2(4000 CHAR),"ATTRIBUTE_03" "
"VARCHAR2(4000 CHAR),"ATTRIBUTE_04" NUMBER(38),"ATTRIBUTE_05" VARCHAR2(4000 "
"CHAR))FINAL INSTANTIABLE "
IMP-00003: ORACLE error 2304 encountered
NOTE: Even though import failed, I now see a new TYPE created called "MTA1526_T".
2. If I try to create the TYPE as is from the error above I get the following error:
SQL> CREATE TYPE MTA1440_T
2 OID '3EE57B1030731774E044080020C94102'
3 AS OBJECT (SYS_XDBPD$ XDB.XDB$RAW_LIST_T,
4 ATTRIBUTE_01 NUMBER(38),
5 ATTRIBUTE_02 VARCHAR2(4000 CHAR),
6 ATTRIBUTE_03 VARCHAR2(4000 CHAR),
7 ATTRIBUTE_04 NUMBER(38),
8 ATTRIBUTE_05 VARCHAR2(4000 CHAR)) FINAL INSTANTIABLE;
9 /
CREATE TYPE MTA1440_T
ERROR at line 1:
ORA-02304: invalid object identifier literal
3. So now I create the "MTA1440_T" type without the OID value and retry the import.
IMP-00061: Warning: Object type "U2"."MTA1440_T" already exists with a different identifier
"CREATE TYPE "MTA1440_T" TIMESTAMP '2007-11-14:14:42:16' OID '3EE57B10307317"
"74E044080020C94102' AS OBJECT ("SYS_XDBPD$" "XDB"."XDB$RAW_LIST_T",""
"ATTRIBUTE_01" NUMBER(38),"ATTRIBUTE_02" VARCHAR2(4000 CHAR),"ATTRIBUTE_03" "
"VARCHAR2(4000 CHAR),"ATTRIBUTE_04" NUMBER(38),"ATTRIBUTE_05" VARCHAR2(4000 "
"CHAR))FINAL INSTANTIABLE "
Questions from me:
A. Can I export TYPES only as suggested by the online documentation ?
B. If importing onto same instance in another schema surely the OID for the TYPE will always fail - so then why can the import not create the required TYPE name itself during the import ?
C. Should I use global TYPES and Register the .XSD globally for all schema's in an instance to validate against .. would this prevent me from having errors on an import ?
I would appreciate any insight any one could provide me. Many thanks in advance.
Dom

Hi Guys,
Thank you all for the replies. I am dissappointed to hear that in 10g does not support exp/imp of schema's structured XML. However I am a little confused or should I say mislead by the "" documentation I
Here is an extract from chapter "30 - Importing and Exporting XMLType Tables" from the Oracle XML DB 10g Developers Guide documentation:
"..... Oracle Database supports the import and export of XML schema-based XMLType tables. An XMLType table depends on the XML schema used to define it. Similarly the XML schema has dependencies on the SQL object types created or specified for it. Thus, exporting a user with XML schema-based XMLType tables, consists of the following steps:
1. Exporting SQL Types During XML Schema Registration. As a part of the XML
schema registration process .....
2. Exporting XML Schemas. After all the types are exported, XML schemas are
exported as XML text .....
3. Exporting XML Tables. The next step is to export the tables. Export of each table consists of two steps:
A. The table definition is exported as a part of the CREATE TABLE statement....
B. The data in the table is exported as XML text. Note that data for out-of-line
tables is.....
From this documentation I was under the impression that the exp/imp of XML Schema-Based XMLType Tables was supported.
Regarding the backup mechanism/strategy for database schema's containing tables with Schema-Based XMLTypes what would you recommend the best online backup method to use - tablespace backups ?
What I need to be able to do in day-to-day work is to have the ability to be able to take a copy of a customers UAT or production database schema and apply it to a dev or test db instance here for bug testing etc. Do you have any advice on best to achieve this without the use of an exp/imp when the schema will contain Schema-Based XMLType tables.
Thank you all for your assistance so far.

Xml schema egistration

i am new to xml . i using oracle 11g.while reading xml i came to know that xml schema registration.
is it compulsary to work with xml data.what is the advantages of xml schema registration. with out registration also i am able to create xmltype tables and i am able to fetch data from tables. then what is the purpose of schema registration
schema registration means what happening exactly.

Schema Registration typically leads to better performance. With Binary XML / XML Index the differences are not critical for most applications. It also allows for better datatyping and compression, since if we tags and datatypes in advance we do do a more efficient encoding. For certain classes of applicaiton, where the object relational storage model is appropraite schema registration can lead to significantly better performance. See the XML DB basic demo for more info and the Hands on Lab for info related to Binary XML and XML Index

Oracle Xml Schema Registration problem.

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